ANP  Vol.4 No.4 , November 2015
Synthesis and Characterization of Bimetallic Gold-Silver Core-Shell Nanoparticles: A Green Approach
ABSTRACT
Bimetallic gold-silver core-shell nanoparticles were prepared by chemical reduction in aqueous solution, following a method that was friendly to the environment, allowing us to use this for medicinal purposes. Gold nanoparticles were synthesized, and silver cations were then reduced on the nanoparticles. Using the optical properties of metallic nanoparticles, surface plasmon resonance was determined by UV-Vis spectroscopy, and the values obtained for gold and silver were approximately 520 nm and 400 nm in wavelength, respectively. The absorption peaks of the surface plasmon band show a clear red-shift due to size effect in the case of the silver surface, and a plasmon coupling effect, in the case of gold. To obtain a better understanding of the coating conditions, high resolution transmission electron microscopy was used. The average hydrodynamic size and the size distribution of the synthesized nanoparticles were obtained by dynamic light scattering. The development of this process, which is benign for the environment, opens the possibility for many applications in the areas of renewable energy, medicine and biology.

Cite this paper
Calagua, A. , Alarcon, H. , Paraguay, F. and Rodriguez, J. (2015) Synthesis and Characterization of Bimetallic Gold-Silver Core-Shell Nanoparticles: A Green Approach. Advances in Nanoparticles, 4, 116-121. doi: 10.4236/anp.2015.44013.
References
[1]   Lee, Y.S. (2008) Self-Assembly and Nanotechnology. John Wiley & Sons, Inc., Hoboken.

[2]   Pal, A., Shah, S. and Devi, S. (2007) Synthesis of Au, Ag and Au-Ag Alloy Nanoparticles in Aqueous Polymer Solution. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 302, 51-57.
http://dx.doi.org/10.1016/j.colsurfa.2007.01.054

[3]   Jain, P.K., Huang, X.H., El-Sayed, I.H. and El-Sayed M.A. (2008) Noble Metals on the Nanoscale: Optical and Photothermal Properties and Some Applications in Imaging, Sensing, Biology, and Medicine. Accounts of Chemical Research, 41, 1578-1586.
http://dx.doi.org/10.1021/ar7002804

[4]   Petryayeva, E. and Krull, U.J. (2011) Localized Surface Plasmon Resonance: Nanostructures, Bioassays and Biosensing—A Review. Analytica Chimica Acta, 706, 8-24.
http://dx.doi.org/10.1016/j.aca.2011.08.020

[5]   Sheny, D.S., Mathew, J. and Philip, D. (2011) Phytosynthesis of Au, Ag and Au-Ag Bimetallic Nanoparticles Using Aqueous Extract and Dried Leaf of Anacardium occidentale. Spectrochimica Acta Part A, 79, 254-262.
http://dx.doi.org/10.1016/j.saa.2011.02.051

[6]   Larguinho, M. and Baptista, P.V. (2012) Gold and Silver Nanoparticles for Clinical Diagnostics—From Genomics to Proteomics. Journal of Proteomics, 75, 2811-2823.
http://dx.doi.org/10.1016/j.jprot.2011.11.007

[7]   Kalishwaralal, K., Deepak, V., Pandian, S.B.R.K., Kottaisamy, M., Kanth, S.B.M., Kartikeyan, B. and Gurunathan, S. (2010) Biosynthesis of Silver and Gold Nanoparticles Using Brevibacterium casei. Colloids and Surfaces B: Biointerfaces, 77, 257-262.
http://dx.doi.org/10.1016/j.colsurfb.2010.02.007

[8]   Zhang, Y.F. and Shen, J.Q. (2007) Enhancement Effect of Gold Nanoparticles on Biohydrogen Production from Artificial Wastewater. International Journal of Hydrogen Energy, 32, 17-23.
http://dx.doi.org/10.1016/j.ijhydene.2006.06.004

[9]   Tran, T.-H. and Nguyen, T.-D. (2011) Controlled Growth of Uniform Noble Metal Nanocrystals: Aqueous-Based Synthesis and Some Applications in Biomedicine. Colloids and Surfaces B: Biointerfaces, 88, 1-22.
http://dx.doi.org/10.1016/j.colsurfb.2011.07.017

[10]   Endo, T., Ikeda, D., Kawakami, Y., Yanagida, Y. and Hatsuzawa, T. (2010) Fabrication of Core-Shell Structured Nanoparticle Layer Substrate for Excitation of Localized Surface Plasmon Resonance and Its Optical Response for DNA in Aqueous Conditions. Analytica Chimica Acta, 661, 200-205.
http://dx.doi.org/10.1016/j.aca.2009.12.022

[11]   Chen, H.M., Liu, R.S., Jang, L.-Y., Lee, J.-F. and Hu, S.F. (2006) Characterization of Core-Shell Type and Alloy Ag/ Au Bimetallic Clusters by Using Extended X-Ray Absorption Fine Structure Spectroscopy. Chemical Physics Letters, 421, 118-123.
http://dx.doi.org/10.1016/j.cplett.2006.01.043

[12]   Sun, L., Luan, W.L., Shan, Y.J. and Tu, S.-T. (2012) One-Step Synthesis of Monodisperse Au-Ag Alloy Nanoparticles in a Microreaction System. Chemical Engineering Journal, 189-190, 451-455.
http://dx.doi.org/10.1016/j.cej.2012.02.043

[13]   Shibata, T., Bunker, B.A., Zhang, Z.Y., Meisel, D., Vardeman II, C.F. and Gezelter, J.D. (2002) Size-Dependent Spontaneous Alloying of Au-Ag Nanoparticles. Journal of the American Chemical Society, 124, 11989-11996.
http://dx.doi.org/10.1021/ja026764r

[14]   Fratoddi, I., Venditti, I., Battocchio, C., Polzonetti, G., Cametti, C. and Russo, M.V. (2011) Core Shell Hybrids Based on Noble Metal Nanoparticles and Conjugated Polymers: Synthesis and Characterization. Nanoscale Research Letters, 6, 98.
http://dx.doi.org/10.1186/1556-276X-6-98

[15]   Raveendran, P., Fu, J. and Wallen, S.L. (2003) Completely “Green” Synthesis and Stabilization of Metal Nanoparticles. Journal of the American Chemical Society, 125, 13940-13941.
http://dx.doi.org/10.1021/ja029267j

[16]   Jana, N.R., Gearheart, L. and Murphy, C.J. (2001) Evidence for Seed Mediated Nucleation in the Chemical Reduction of Gold Salts to Gold Nanoparticles. Chemistry of Materials, 13, 2313-2322.
http://dx.doi.org/10.1021/cm000662n

 
 
Top